JPH11273261A - Address allocation method, recording/reproducing device, its method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording/reproducing device for allocating addresses so that recording/reproducing can be performed efficiently for floppy disks of different kinds. SOLUTION: A recording/reproducing device performs recording/reproducing of information signals for a first floppy disk which is divided into plural zones of a concentric circle and in which information signals are recorded with different parameters for each zone, or for a second floppy disk which is not divided into zones. And the device has a disk type discriminating section 17 for discriminating the type of the first floppy disk 1, signal processing sections 31-36 for performing signal processing for the first floppy disk, signal processing sections 21-266 for performing signal processing for the second floppy disk, and a control section 15 for controlling address allocation so that successive addresses are allocated to a recording track for the first floppy disk, and addresses are allocated so that the same tracks of both surfaces are switched alternately for the second floppy disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an address allocating method, an apparatus and a method for allocating addresses to an existing floppy disk and a floppy disk having a large storage capacity compatible with the existing floppy disk. And a recording medium.

[0002]

2. Description of the Related Art Conventionally, a floppy disk has been provided as a recording medium for recording / reproducing information signals in a disk drive device.

In a floppy disk, a plastic record disk made of a magnetic material is housed in a paper or plastic jacket so that information signals can be magnetically stored.

A disk drive for recording / reproducing data on / from such a floppy disk, a so-called floppy disk drive (FDD), is widely used in various information devices such as personal computers and workstations.

By the way, a floppy disk with a large capacity of several tens of megabytes to several hundreds of megabytes has been proposed as compared with a conventional floppy disk of at most several megabytes.

The increase in the capacity of a floppy disk can be achieved by the integration of various technologies such as the material of a recording medium, the structure of a head chip, processing of a reproduction signal, and the presence or absence of a tracking servo.
Achieved. As one type of large-capacity floppy disk drive device, a floating type device that records / reproduces data while the magnetic head is slightly lifted from the recording surface of the disk at a high disk rotation speed has been proposed.

[0007]

However, in a large-capacity floppy disk which realizes zone bit recording in which a recording surface is divided into a plurality of zones in the radial direction in order to realize a large capacity, recording / reproduction is performed by zones. The parameters used for are different. In particular, in order to provide compatibility with an existing floppy disk, the positions of the head chips of the upper and lower heads are different even if the positions of the head sliders are on the same radius.

In the head configured as described above,
The upper and lower tracks having the same track number must exist on the same radius, and the upper and lower tracks may exist in different zones.

Here, for reference, a specific value of a track shift amount between the track 0 and the track 1 for a conventional 3.5-inch floppy disk is shown with respect to a track density of 67.5 TPI. Is 4 and 8 for a track density of 135 TPI.

In such a case, even if the track has the same track number, the track may belong to a different zone. Therefore, even if the head is switched, the parameters required for recording / reproducing must be reset. The advantage of the conventional method in which high-speed data recording / reproduction is performed by switching the heads above and below the disk is lost.

On the contrary, since the number of data sectors per track differs depending on the zone, it is necessary to independently grasp and manage data sectors that can be used by upper and lower heads by switching heads. The firmware must control the switching of these parameters and the management of the number of data sectors sequentially, and the burden increases.

The large-capacity Floppy Disk Drive of the floating type that has already been proposed has a problem that it does not have compatibility with existing Floppy Disk Drives, that is, does not have backward compatibility. Therefore, in the next few years, there has been a problem that in a situation where a current floppy disk drive is used, a disk drive device for a large-capacity floppy disk cannot be built in a personal computer.

According to the present invention, there is provided an address allocating method which is proposed in consideration of the above-mentioned circumstances, has backward compatibility, and further improves recording / reproducing characteristics of a high-density head chip. It is an object to provide a recording / reproducing apparatus and method, and a recording medium.

[0014]

In order to solve the above-mentioned problems, an address assignment method according to the present invention is directed to a recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate. Thus, addresses are assigned to a first recording medium which is divided into a plurality of concentric zones and in which information signals are recorded with different parameters for each zone, and a second recording medium which is not divided into zones. In the address allocating method, an address is sequentially allocated to the first recording medium on a recording track on the same surface of the recording medium, and the inner surface or the outermost surface of the recording medium to which the address is allocated is turned to the opposite surface. Addresses are sequentially assigned to the recording tracks of the recording medium, and the second recording medium is addressed so that the same track on both sides of the recording medium is alternately switched. Those having an address assignment process to allocate.

A recording / reproducing apparatus according to the present invention is a recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate, and is divided into a plurality of concentric zones. In a recording / reproducing apparatus for recording / reproducing an information signal on / from a first recording medium on which an information signal is recorded with different parameters for each zone and a second recording medium which is not divided into zones, A recording medium discriminating unit for discriminating whether the recording medium is the first recording medium or the second recording medium, and the first and second recording media according to a result from the recording medium discriminating unit. A recording / reproducing means for recording / reproducing an information signal on / from a recording medium, and an address are sequentially allocated to recording tracks on the same surface of the recording medium for the first recording medium. Sequentially allocates addresses to the recording tracks on the opposite side from reaching the innermost or outermost periphery of the medium,
An address is assigned to the second recording medium so that the same track on both sides of the recording medium is alternately switched, and the recording / reproducing means assigns an address to the first or second recording medium according to the address assignment. Record /
And control means for performing control to perform reproduction.

Further, the recording / reproducing method according to the present invention comprises:
A recording medium on which an information signal is recorded along recording tracks formed on a disk-shaped substrate, wherein the information signal is divided into a plurality of concentric zones and the information signal is recorded with different parameters for each zone. A recording / reproducing step of recording / reproducing an information signal on / from the first and second recording media using the first recording medium and a second recording medium that is not divided into zones; For a recording medium, addresses are sequentially assigned to recording tracks on the same surface of the recording medium, and addresses are sequentially assigned to recording tracks on the opposite surface after reaching the innermost or outermost periphery of the recording medium to which the addresses are assigned. Addresses are assigned to the second recording medium so that the same tracks on both sides of the recording medium are alternately switched. In the recording / reproducing step, the addresses are assigned to the second recording medium. In which a control step of controlling to perform recording / reproducing for the serial first or second recording medium I.

A recording medium according to the present invention is a recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate, and wherein the recording medium is divided into concentrically divided areas. In a recording medium on which information signals are recorded with different parameters, addresses are sequentially assigned to recording tracks on the same surface of the recording medium, and the addresses are assigned to the innermost circumference or the outermost circumference of the recording medium. The addresses are sequentially assigned to the recording tracks.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an address assigning method, a recording / reproducing apparatus and method, and a recording medium according to the present invention.

FIG. 1 shows an example of a disk drive device according to an embodiment of the present invention. As shown in FIGS. 2A and 2B, at least two types of floppy disks 1A and 1B are assumed as the floppy disk 1 which is a recording medium usable in the disk drive device shown in FIG. That is, FIG. 2A shows a high-density (upper mode) disk medium 2A having a large recording capacity of about several tens to several hundreds of megabytes or more, which is compatible with existing floppy disks. FIG. 2B shows an existing floppy disk 1A.
This figure shows a floppy disk 1B containing a disk medium 2A of a standard recording density (lower mode) having a recording capacity of about M bytes. In FIG. 2, a write protector 5 indicates a writable state when the hole is closed and a write-protected state when the hole is opened, and an HD hole 6 indicates a recording capacity when the hole is opened. A so-called 2HD disk of about 2 Mbytes (when unformatted)
When the hole is closed, the other disks are shown. In FIG. 2A, a hole 7 provided at a predetermined position other than the write protector 5 and the HD hole 6 indicates that the disk is a high recording density disk of the upper mode. The position is determined at a predetermined position according to the standard of a large-capacity floppy disk having a recording capacity of about several tens to several hundreds of megabytes, for example.

Disk medium 1 of high recording density (upper mode) floppy disk 1A having the above-mentioned large recording capacity
A employs zone bit recording in which a recording surface is divided in the radial direction by zones to realize a large recording capacity and information signals are recorded with different parameters for each zone, as shown in FIG. I have.

A method of recording an information signal on the disk medium 1A will be described with reference to the principle explanatory diagram of FIG. The signal recording surface on which the information signal is recorded is divided into zones z1 and z2, which are concentric regions. In each of these zones, parameters used for recording / reproduction are different.

Servo sectors 111 used for servo are formed in the radial direction of the disk medium 1A of high recording density (upper mode). Between the servo sectors 111,
A sector, which is a unit area in which an information signal is recorded, is formed.
While three sectors are formed between the servo sectors 111, two sectors are formed between the servo sectors 111 in the zone z2. At 112 in the figure, a head seek is performed.

Here, in the disk medium 1A shown in FIG. 3, zones z0 and z1 are shown, but the number of zones is not limited to this. For example, seven zones z0 to z6 can be formed on the disk medium 1A.

As a means for identifying the large-capacity, high-recording-density (upper mode) floppy disk 1A, instead of providing the hole 7 as shown in FIG.
The light reflecting member 8 may be provided as shown in FIG. 3, and in addition, an identification means such as presence or absence of a notch, difference in reflectance, etc. may be used. When a plurality of upper modes are defined, for example, due to a difference in recording capacity or the like, a plurality of types of upper modes may be identified by a combination of a plurality of holes.

Returning to FIG. 1, the floppy disk 1
The magnetic head element 122 for magnetically recording / reproducing (1A or 1B) has a magnetic head element 12
The magnetic head element 12 has a floppy disk 1B of the above-mentioned standard recording density (lower mode).
And a head chip for the high recording density (upper mode) floppy disk 1A. The motor 14 drives the floppy disk 1 to rotate. The control unit 15 controls the operation of the entire disk drive, such as the rotational drive control of the motor 14 and the movement control of the magnetic head element 12, and a mode signal (signal indicating the upper mode or the lower mode) described later. In response to this, the control of switching the rotation speed of the motor 14, the switching of the recording / reproducing circuit, and the switching of the interface are performed. A detection signal from a detection unit 16 that mechanically or optically detects the identification means (for example, the hole 7) of the floppy disk 1 is sent to the control unit 15 as the mode signal via a disk type determination circuit 17. ing.

The magnetic head section 122 is disposed above and below the floppy disk 1 and includes a magnetic head section 122A on the upper side of the floppy disk 1 and a magnetic head section 122b on the lower side of the floppy disk 1. The high recording density (upper mode) head chip and the standard recording density (lower mode) head chip provided in the magnetic head elements 12 of these magnetic head sections 122A and 122B will be described later in detail.

The recording / reproducing system connected to the head chip for the lower mode includes an amplifying circuit 21, a modulation / demodulation circuit 2
2. Formatting / format decomposition circuit 23, error processing circuit 24, buffer memory 25, and existing FDD
A recording / reproducing system including an FDDIF 26 which is an interface (IF) for a (floppy disk drive), and connected to the head chip for the upper mode,
Amplifying circuit 31, modulation / demodulation circuit 32, formatting /
An IDE (Intelligen) which is an interface for a large-capacity data storage device such as a format decomposition circuit 33, an error processing circuit 34, a buffer memory 35, and a hard disk.
t Drive Electronics) It has IF36.

Here, the FDDIF 26 is, for example,
This is a so-called 3.5-inch micro floppy disk interface. This interface has a function of directly reading and writing magnetic information of a disk by a peripheral LSI called a so-called FDC (Floppy Disk Controller), and is controlled by the lowest level control method even in a current personal computer. By recording the minimum system files on a floppy disk,
There is an advantage that, even when booting from another data storage device or the like is not possible, booting from a floppy disk is possible. On the other hand, the IDE interface 36 is generally widely used as an interface of a storage device such as a built-in hard disk device of a personal computer, and has a high transfer rate and a high control function. Most personal computers are provided with at least one floppy disk drive in consideration of the fact that the basic OS cannot be started.

Such a floppy disk interface uses the same interface as that used for personal computers with an initial 8-bit CPU or 16-bit CPU as it is.
It has not changed much since the 8-inch floppy disk drive was made, and it has become the de facto standard. Also, floppy disk devices in personal computers have been widely used as external storage devices for computers before hard disks appeared on the market, and most of the personal computers currently on the market were mounted on hardware and boards. The start-up ROM enables the start-up from a floppy disk.

Next, address assignment to the high recording density (upper mode) floppy disk 1A adopting the zone bit recording method, in which recording / reproduction is performed by the disk recording device, will be described.

As shown in a partial sectional view of FIG. 5, a disk medium 2A of a large capacity high recording density (upper mode) floppy disk 1A divides the disk medium 2A into a plurality of concentric zones. A zone bit recording system for recording / reproducing an information signal with different parameters for each zone is employed.

In the disk medium 2A of FIG. 5, (n + 1) zones z0 to zn are formed from the inner peripheral side to the outer peripheral side of the disk. In these zones z0 to zn, information signals are recorded / reproduced with different parameters for each zone.

As the parameter, for example, the angular velocity of the disk medium 2A when recording / reproducing the information signal can be mentioned. Also, the number of sectors may be different for each zone depending on the parameter.

Magnetic head elements 12 for magnetically recording / reproducing information signals with respect to the disk medium 2A are provided above and below the disk medium 2A, respectively.

The magnetic head element 12 disposed above the disk medium 2A is provided with a head chip 123 for standard recording density (lower mode) and a head chip 124 for high recording density (upper mode). .

The magnetic head element 12 disposed below the disk medium 2A is provided with a head chip 223 for standard recording density (lower mode) and a head chip 224 for high recording density (upper mode). I have.

The head chip 123 for the standard recording density (lower mode) of the magnetic head element 12 disposed above the disk medium 2A has a high recording density (lower mode) of the magnetic head element 12 disposed below the disk medium 2A. It is disposed so as to face the head chip 224 for the upper mode) with the disk medium 2A interposed therebetween.

The head chip 124 for the high recording density (upper mode) of the magnetic head element 12 disposed above the disk medium 2A is a standard recording head of the magnetic head element 12 disposed below the disk medium 2A. The head chip 223 for the density (lower mode) is disposed so as to face the disk chip 2A with the disk medium 2A interposed therebetween.

The details of the magnetic head element 12 and the like will be described later in detail.

Since the head chips 124 and 224 corresponding to the high recording density (upper mode) are displaced in the radial direction of the disk, the head chips above and below the disk medium 2A shown by L in FIG. Are also shifted according to the radial separation distance of the head chips 124 and 224.

In FIG. 5, the head chip 124 included in the magnetic head element 12 above the disk medium 2A is closer to the outer periphery of the disk than the head chip 224 included in the magnetic head element 12 below the disk medium 2A.

Correspondingly, the movable range of the head chip 124 of the magnetic head element 12 above the disk medium 2A is limited to the magnetic head element 1 below the disk medium 2A.
2 is shifted to the outer peripheral side of the disk from the movable range of the head chip 224 included in the head 2. However, the movable range itself is equal to the distance L in both cases.

Here, with respect to the existing standard recording density (lower mode) floppy disk 1B, the address is allocated after the track is determined, the sectors in the track are assigned in ascending order in the rotation direction, and then the disk medium 2A
Is switched to the magnetic head element 12 which faces the sector, and the sectors on the back side of the same track number are numbered.

The reason for assigning addresses in this manner is that switching between the upper and lower magnetic head elements 12 is faster in time than sending tracks.

On the other hand, as shown in FIG. 6, the disk medium 2A of the large capacity high recording density (upper mode) floppy disk 1A is divided into a plurality of concentric zones. The head chips 124 and 224 for high recording density (upper mode) arranged at a predetermined interval in the radial direction of the disk medium 2A may belong to different zones above and below the disk medium 2A.

That is, in FIG. 6, the head chip 124 for the high recording density (upper mode) of the magnetic head element 12 on the upper side of the disk medium 1A is located in the zone zk + 1 and on the magnetic head element 12 on the lower side of the disk medium 1A. The head chip 224 for high recording density (upper mode) belongs to the zone zk.

As described above, each zone is recorded with different parameters. Therefore, in FIG. 6, for example, when the head chip 124 for the high recording density (upper mode) on the upper side of the disk medium 1A is switched to the head chip 224 for the higher recording density (upper mode) on the lower side of the disk medium 1A, Head chip 124
The zone for recording / reproducing is from zone zk + 1 to zone z
Since it is switched to k, the parameter is also switched correspondingly.

For this reason, the high recording density (upper mode) floppy disk 1A adopting the zone bit recording method is used.
In this case, it is necessary not only to switch the magnetic head element 12 that performs recording / reproduction to the disk medium 2A facing the disk medium 2A, but also to switch the parameters according to the zone.

Therefore, in the case of the high recording density (upper mode) floppy disk 1A, the magnetic head element 1
Since a predetermined time is required to switch the magnetic head element 12 up and down, the movement of the magnetic head element 12 in the radial direction of the disk medium 2A is rather faster in time.

On the contrary, since the number of data sectors per track differs depending on the zone, it is necessary to independently grasp and manage the data sectors that can be used by the upper and lower heads by switching the head. The firmware must control the switching of these parameters and the management of the number of data sectors sequentially, and the burden increases.

Under such circumstances, in a disk drive device, for a high recording density (upper mode) floppy disk employing zone bit recording, tracks having the same track number are alternately used by switching heads. Is stopped, and physical addresses are allocated so that tracks existing on the same surface are sequentially used while performing track feed.

FIG. 7 shows a specific example of this method in which a large-capacity, high-recording-density (upper mode) floppy disk 1A is allocated to a circular layout for a disk medium 2A, and then a physical address is converted to a logical address by circular mapping. An example of mapping to is shown.

The address allocation based on the circular layout means that addresses are sequentially allocated around the disk medium 2A around the circular.

In this specific example, a physical address is allocated from the lower middle of the disk medium 2A of the high-density (high-order mode) floppy disk 1A toward the outer periphery, and the physical addresses are allocated to the upper periphery of the disk. From the outer circumference to the inner circumference, the physical address advances from the lower inner circumference to the middle circumference.

After the address allocation is performed in this way, as shown in a path a, on the lower surface of the disk medium 2A, the diameters of the innermost and outermost recording tracks of the information area in which the information signal can be recorded are recorded. Mapping from a physical address to a logical address is sequentially performed on the outer circumference side with a recording track having a substantially central diameter as a starting point.

When the mapping to the logical address reaches the outermost periphery of the information area on the lower surface, the mapping is performed in order from the outermost periphery of the information region on the upper surface to the inner peripheral side as shown by a path b. Then, when the mapping reaches the inner periphery in the case of the information region on the upper surface, the mapping is performed in order from the innermost periphery to the outer peripheral side of the information region on the lower surface as shown in a path c.

In the disk medium 2A, in addition to the information area to which the circular mapping is applied, a defect list 101 for recording the distribution of the defect area and the like, an empty track 102, and slipping and use performed at the time of factory shipment occur. A spare area 103 for supplementing a defective area is also provided.

The allocation of physical addresses by such circular addressing and the mapping from physical addresses to logical addresses following the allocation of physical addresses minimize the frequency of head switching.
Data sectors in the same zone can be used collectively. Since the recording / reproducing parameters are the same in the same zone and the number of data sectors per track is constant, the management and control of these are very simple.

Next, the configuration of the magnetic head unit 122 including the magnetic head element 12 for magnetically recording / reproducing information signals to / from the floppy disk 1 will be specifically described with reference to the drawings.

As shown in FIG. 8, the upper magnetic head 122A is supported by the support arm 140A so as to sandwich the floppy disk 1 vertically.
The lower magnetic head portion 122B is supported by the support arm 140B.

The magnetic head portions 122A and 122B are respectively provided with a spacer member 142 mounted on the tip 141 of the support arm 140A and 140B,
2 and the gimbal 143
3 and the above-described magnetic head element 12.

As shown in FIG. 9, the upper and lower head portions 122A and 122B are arranged to face each other with the floppy disk 1 interposed therebetween. In this case, as shown in FIG. 9, the rail 1 of the magnetic head element 12 constituting the head section 122A is used.
26a and 126b are arranged so as to face the rails 126b and 126a of the magnetic head element 12 constituting the head portion 122B, respectively.

Further, the center of the head chips 123, 124 (not shown in FIG. 9; see FIG. 10) provided on the rails 126a, 126b of the magnetic head element 12 constituting the head section 122A in the disk radial direction. CEB
2, and CEB1. In this case, the outer edges 130a, 126a of the rails 126a, 126b of the magnetic head element 12 constituting the head 122A,
The center in the disk radial direction excluding 130b and the head 1
Rail 126 of the magnetic head element 12 constituting the magnetic head 22B
Except for the outer edge portions 130b and 130a of the outer edges b and 126a, the center in the disk radial direction substantially coincides.

FIGS. 10A to 10C show the magnetic head parts 122A,
12B shows a configuration of a magnetic head element 12 that forms part 122B. FIG. 10A is a bottom view of the magnetic head element 12 as viewed from the floppy disk 1 side. FIG. 10B corresponds to FIG.
It is a figure which shows the cross-sectional outline on the aa 'line of A. FIG. 10C
FIG. 10B is a side view of the magnetic head element 12 viewed from the lower side of FIG. 10A.

Slider 1 Constituting Magnetic Head Element 12
25, two rails 126a and 126b are formed to extend in the same direction as the track tangential direction (disk rotation direction) R and to extend in parallel with each other. The front side and the rear side are defined with reference to the tangential direction R of the track. Front tapers 127a and 127b are formed on the front sides of the rails 126a and 126b, and rear tapers 128a and 128b are formed on the rear side.

In this case, the width Db of the rail 126b is smaller than the width Da of the rail 126b. The inner edge 12 of each of the rails 126a, 126b
9a and 129b are blended and the rail 12
6a, 126b, each outer edge 130a,
130b is processed in a tapered shape. Note that the inner edge portions 129a, 129 of the rails 126a, 126b.
Edges other than b are also blended,
The edge prevents the recording surface of the disk from being damaged.

A head chip 123 for a standard recording density (lower mode) is mounted on the rail 126a. In the lower mode, the floppy disk 111 rotates at the standard speed, not described above. At this rotation speed, the slider 25 does not fly, and the head chip 123 and the disk recording surface come into contact with each other, so that data recording / reproduction is performed. For this reason, the recording / reproducing unit 123a and the erasing unit 1
23b are provided.

The head chip 24 for high recording density (upper mode) is mounted on the rear side of the rail 26b in the tangential direction R of the track. The head chip 24 has a structure capable of increasing the linear recording density, for example, MIG (Metal
In Gap) Head structure. In the upper mode, the floppy disk 1 rotates at a high speed, without being described above. At this rotation speed, a floating pressure is generated by the air flow, and the slider 125 flies.

Since data is recorded / reproduced while the floppy disk 1 is rotating at a high speed and the slider 125 is flying, the gap between the disk recording surface and the head chip 124 and the gap Is adjusted so as to be a predetermined value. This flying height is defined by the width of the rails 126a and 126b, assuming that the relative peripheral speed of the floppy disk 1 is constant. As described above, the width Db of the rail 126b is smaller than the width Da of the rail 126a in order to reduce the flying height of the rail 126b and sell the disk so that the gap between the disk recording surface and the head chip 124 has a predetermined value. Is done. As a result, the slider 125 is in a floating state,
The rail 126b is inclined so as to be closer to the disk recording surface than 6a.

Next, the circuit portion of the disk drive will be described with reference to FIG. Specifically, in the circuit portion of the disk drive device,
The startup ROM is connected to the CPU bus 71 connected to
72, a RAM 74, and an FDC (floppy disk controller) 75 are connected, and the FDC 75 is connected to a floppy disk device via an FDDIF (floppy disk drive interface) 76.

As described above, in the case of the floppy disk drive connected via the FDC 75, a BIOS (Basic IO System) and a bootstrap ROM executed when the system is started up when the personal computer is turned on or reset. Recognizes the floppy disk device and performs an operation of reading the system file from the booting floppy.

A boot program is stored in a memory, for example, R from the floppy disk or from the hard disk.
When read into the AM 74, the startup ROM 72
Bootstrap loader 73 passes control of the computer to its boot program. The disk boot program is for performing processing for reading another larger disk program, for example, an OS (operating system).

The above is the processing at the time of system startup performed in the case of a normal personal computer.
Similarly, in the case of the disk drive device according to the embodiment of the present invention, the standard recording density (lower mode)
It is possible to start up the system using a floppy disk.

However, the disk drive according to the embodiment of the present invention has the FDD interface 26 and the IDE interface 36 as shown in FIG. The connection with the computer is made.

That is, the FD on the computer side in FIG.
The D interface 76 and the FDD interface 26 of the disk drive device 10 are connected,
The IDE interface 77 on the computer side and the IDE interface 36 on the disk drive device 10 side are connected. The computer side IDE interface 77 is connected to the CPU bus 71.

A SCSI (Small Computer Interface) interface 78 or the like is connected to the CPU bus 71 as necessary, and an SCS such as a hard disk drive is connected to the CPU bus 71.
It is connected to the SCSI interface 81 of the I device 80.

Here, as the interface of the disk for high recording density (upper mode) of the disk drive device of FIG. 1, instead of the above-mentioned IDE interface, an E (Extended) IDE interface or S
CSI (Small Computer Interface), IEEE (Inst
itute of Electrical and Electronics Engineers) 1
Various high-level, high-capacity interfaces, such as the 394 standard interface, may be used.

In the disk drive shown in FIG. 1 having such compatibility between the upper mode floppy disk 1A and the lower mode floppy disk 1B, for example, when recording / reproducing on the lower mode floppy disk 1B is performed. When an access request for recording / reproduction is issued to the FDDIF 26 from an external host computer or the like, the presence / absence of the lower mode floppy disk 1B is determined by a procedure described later. Recording of recording data from a computer or the like and reproduction of recording data from the floppy disk 1B are performed.

More specifically, at the time of recording, the recording data is stored in the buffer memory 25 via the FDDIF 26, and the recording data from the buffer memory 25 is sent to the error processing circuit 24, where a CRC or the like is generated and added. The data is sent to a formatting / format decomposing circuit 23 and is converted into data of a predetermined format having a sector structure suitable for recording on an existing floppy disk. The formatted data is sent to a modulation / demodulation circuit 22, where the data is subjected to a predetermined digital modulation (for example, MFM), amplified by an amplifier circuit 21, and the magnetic head element 1 for the lower mode.
2 and recorded on the floppy disk 1B.

At the time of reproduction, contrary to the above-mentioned recording,
Data reproduced from the floppy disk 1B by the magnetic head element 12 is amplified by the amplifying circuit 21, digitally demodulated by the modulation / demodulation circuit 22, and subjected to format decomposition by the formatting / format decomposition circuit 23, and is subjected to the error processing circuit 24. Are sent to a host computer or the like via the buffer memory 25 and the FDDIF 26.

Next, when recording / reproducing to / from the floppy disk 1A in the upper mode, an external host computer or the like issues an access request for recording / reproducing to the IDEIF 36, and the lower order is performed according to a procedure described later. The presence or absence of the floppy disk 1A in the mode is determined.
When it is determined that the floppy disk 1A in the upper mode is present, the recording data from the host computer or the like is recorded on the floppy disk 1A or the floppy disk 1A is recorded.
The recording data of A is reproduced.

More specifically, at the time of recording, the recording data is stored in the buffer memory 35 via the IDEIF 36, and the recording data from the buffer memory 35 is sent to the error processing circuit 34 to generate and add parity and error correction codes. Is done. The data from the error processing circuit 34 is sent to the formatting / format decomposing circuit 33, and is converted into data of a predetermined format having a sector structure suitable for recording on the floppy disk 1A in the upper mode.
The formatted data is sent to a modulation / demodulation circuit 32, where it is subjected to a predetermined digital modulation (for example, MFM), amplified by an amplifier circuit 31, and supplied to the lower mode head chip 13 for floppy disk drive. Disc 1A
Will be recorded.

At the time of reproduction, contrary to the above-described recording,
Data reproduced from the floppy disk 1A by the head chip 13 is amplified by the amplification circuit 31, digitally demodulated by the modulation / demodulation circuit 32, format-decomposed by the formatting / format decomposition circuit 33, and error-corrected by the error processing circuit 34. Processing such as correction is given,
Through the buffer memory 35 and the IDEIF 36,
Sent to a host computer or the like.

Here, when the floppy disk 1 is inserted and mounted in the disk drive device of FIG. 1, the detection unit 16 detects, for example, the presence or absence of the hole 7 of FIG. The discrimination between the floppy disk 1A in the upper mode and the floppy disk 1B in the lower mode is performed, and the discrimination result is sent to the control unit 15 as a mode signal. The control unit 15 determines the interface for recording / reproducing data to either the IDEIF 36 or the FDDIF 26 based on the mode signal. On the other hand, the host computer can access any of a plurality of interfaces provided in the disk drive device. That is, an access request from the host computer can occur to the disk drive without knowing which of the floppy disks 1A and 1B can be actually used. In this case, the disk drive device must show some reaction to any request from the host, regardless of the interface. That is, normal data recording / reproducing is performed on an interface that can be accessed by inserting a disk, and a response to a request for an invalid interface other than the above indicates that there is no disk.

The control unit 15 sequentially assigns addresses to the recording tracks on the same surface of the floppy disk 1A in the upper mode, and starts recording on the opposite surface after reaching the innermost or outermost periphery of the recording medium to which the addresses are assigned. Addresses are sequentially assigned to the tracks, and addresses are assigned to the floppy disk 1B in the lower mode so that the same track on both sides is alternately switched. When recording / reproducing on the floppy disks 1A and 1B,
The recording / reproducing of the information signal with respect to the recording track is performed in the order based on the address allocation.

Next, a series of steps relating to the address assignment method will be described with reference to the flowchart shown in FIG.

This address allocation method includes a large-capacity, high-density recording (upper mode) floppy disk 1A in which a plurality of concentric zones are divided and information signals are recorded with different parameters for each zone; The addresses are allocated to the floppy disk 1B of the standard recording density (lower mode) which is not divided into the groups.

The first step S11 is a recording medium determining step of determining whether the floppy disk is in the upper mode or the lower mode. Then, the process proceeds to the next step S12.

Step S12 is an address allocation switching step of switching to the address allocation corresponding to the upper mode or lower mode floppy disks 1A and 1B according to the result of the discrimination of the type of the floppy disk in the recording medium discriminating step of step S11. is there. Then, the process proceeds to the next step S13.

In step S13, addresses are sequentially allocated to recording tracks on the same surface with respect to a floppy disk in the upper mode, and addresses are sequentially allocated to recording tracks on the opposite surface after reaching the innermost or outermost circumference where the addresses are allocated. This is an address allocating step of allocating addresses so that the same track on both sides is alternately switched with respect to the floppy disk in the lower mode.

Then, in step S13, a series of steps related to the address allocating step is completed.

Next, a series of steps relating to the recording / reproducing method will be described with reference to the flowchart shown in FIG.

This recording / reproducing method includes a large-capacity high-recording-density (upper-mode) floppy disk 1A divided into a plurality of concentric zones and recording information signals with different parameters for each zone. An information signal is recorded / reproduced on / from a standard density floppy disk 1B which is not divided into zones.

The first step S21 is a control step, in which addresses are sequentially allocated to the recording tracks on the same surface for the upper-level mode floppy disk 1A. Addresses are sequentially assigned to the recording tracks on the surface, and addresses are assigned to the floppy disk 1B in the lower mode so that the same track on the opposite surface is alternately switched.

In the control step of step S21, the recording / reproducing step of step 21 is controlled so that recording / reproducing to / from the floppy disks 1A and 1B is performed in accordance with the address allocation. Then, the process proceeds to the next step S22.

Step S22 is the same as the floppy disk 1
This is a recording / reproducing process for recording / reproducing information signals for A and 1B. A series of steps relating to the recording / reproducing method ends in step S22.

Next, the recording medium will be described. This recording medium is a recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate, and the information signals are transmitted with different parameters for each concentrically divided area of the recording medium. A recording medium to be recorded, wherein addresses are sequentially assigned to recording tracks on the same surface, and addresses are sequentially assigned to recording tracks on both surfaces after the address assignment reaches the innermost circumference or the outermost circumference of the recording medium. It is.

In such a recording medium, a magnetic material is coated on both surfaces of a disk-shaped substrate rotatably housed in a flat rectangular parallelepiped housing, and the recording tracks are formed on the recording tracks by the residual magnetization of the magnetic material. A so-called floppy disk, on which information signals are recorded, is provided by performing the above-described address assignment.

As described above, according to the present invention, in the conventional floppy disk, the upper and lower tracks having the same track number are sequentially and alternately used to assign addresses.
In a large-capacity floppy disk divided into zones, addresses are assigned by sequentially using the same track. Further, these different address allocation methods are automatically used depending on the type of the inserted disc.

The present invention is not limited to the above embodiment. For example, in addition to a floppy disk, a magneto-optical disk can be used as the recording medium.

[0101]

As described above, according to the present invention, the conventional type of floppy disk employs an access method of alternately using upper and lower tracks, and a high-capacity medium employs a method of using each disk surface. Thereby, the most effective recording / reproduction can be achieved in each system.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a disk drive device.

FIG. 2 illustrates an example of a large-capacity floppy disk and an existing floppy disk.

FIG. 3 is a principle explanatory diagram illustrating recording of an information signal on a disk medium by a zone bit method.

FIG. 4 is a diagram showing another example of a large-capacity floppy disk.

FIG. 5 is a diagram showing a relationship between a magnetic head element and a zone of a disk medium.

FIG. 6 is a diagram showing a state where the corresponding head chips of the magnetic head element are located in different zones of the disk medium.

FIG. 7 is a diagram illustrating address assignment of a circular layout.

FIG. 8 is a diagram showing a configuration of upper and lower magnetic head units.

FIG. 9 is a diagram showing an arrangement relationship between upper and lower magnetic head elements.

FIG. 10 is a three-view drawing showing a magnetic head element.

FIG. 11 is a block diagram showing a circuit portion of the disk drive device.

FIG. 12 is a flowchart illustrating steps of an address assignment method.

FIG. 13 is a flowchart showing steps of a recording / reproducing method.

[Explanation of symbols]

1 floppy disk, 1A large capacity floppy disk, 1B existing floppy disk, 20 magnetic head elements, 122 magnetic head section

Claims (8)

[Claims] 1. A recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate,
An address for allocating an address to a first recording medium divided into a plurality of concentric zones and recording information signals with different parameters for each zone, and a second recording medium not divided into zones. In the allocating method, addresses are sequentially allocated to the recording tracks on the same surface of the first recording medium, and the recording is performed on the opposite surface after reaching the innermost circumference or the outermost circumference of the recording medium to which the addresses are allocated. An address assignment method, comprising: assigning addresses sequentially to tracks; and assigning addresses to the second recording medium so as to alternately switch the same track on both sides of the recording medium. 2. The method according to claim 1, further comprising a recording medium determining step of determining whether the recording medium is the first recording medium or the second recording medium. 3. An address assignment switching step of switching the address assignment step to an address assignment corresponding to a first or second recording medium in accordance with a result of the discrimination of the recording medium in the recording medium discrimination step. 3. The address assignment method according to claim 2, wherein: 4. A recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate,
Recording of information signals on a first recording medium which is divided into a plurality of concentric zones and in which information signals are recorded with different parameters for each zone, and on a second recording medium which is not divided into zones A recording / reproducing apparatus for performing / reproducing, a recording medium discriminating means for discriminating whether the recording medium is the first recording medium or the second recording medium, and a result from the recording medium discriminating means. Recording / reproducing means for recording / reproducing information signals on / from the first and second recording media, and sequentially addressing recording tracks on the same surface of the recording medium for the first recording medium. After arriving at the innermost circumference or the outermost circumference of the recording medium to which the address is allocated, the address is sequentially allocated to the recording track on the opposite side. Allocating an address to switch the tracks alternately,
A recording / reproducing apparatus, characterized in that the recording / reproducing means includes control means for controlling recording / reproducing on / from the first or second recording medium in accordance with the address assignment. 5. The recording medium according to claim 1, wherein the first and second recording media are stored in a rectangular parallelepiped flat casing, and the recording medium discriminating means determines whether there is a transmission hole, a light reflecting member, or a notch in the casing.
5. The recording / reproducing apparatus according to claim 4, wherein the first and second recording media are determined based on the level of reflectance. 6. A recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate,
The first and second recording media which are divided into a plurality of concentric zones and in which information signals are recorded with different parameters for each zone, and the second recording medium which is not divided into zones are used. Recording an information signal on the second recording medium /
A recording / reproducing step of reproducing, and sequentially assigning addresses to the first recording medium on recording tracks on the same surface of the recording medium, and after reaching an innermost circumference or an outermost circumference of the recording medium to which the address is allocated. Addresses are sequentially assigned to the recording tracks on the opposite side, and addresses are assigned to the second recording medium so that the same tracks on both sides of the recording medium are alternately switched.
The recording / reproducing step includes a control step of controlling recording / reproduction on the first or second recording medium in accordance with the address assignment. 7. A recording medium on which information signals are recorded along recording tracks formed on a disk-shaped substrate,
In a recording medium in which an information signal is recorded with different parameters for each area obtained by concentrically dividing the recording medium, addresses are sequentially assigned to the recording tracks on the same surface, and the address assignment is performed by the recording. A recording medium characterized in that addresses are sequentially assigned to recording tracks on both sides after reaching an innermost circumference or an outermost circumference of the medium. 8. The recording medium according to claim 7, wherein said recording medium has a different number of sectors for each of said zones, and information signals are recorded at different angular velocities for each of said zones. .